EP1595023A2 - Hochfestes, langlebiges lasttragendes gewebe/nahtbindesystem - Google Patents

Hochfestes, langlebiges lasttragendes gewebe/nahtbindesystem

Info

Publication number
EP1595023A2
EP1595023A2 EP04708585A EP04708585A EP1595023A2 EP 1595023 A2 EP1595023 A2 EP 1595023A2 EP 04708585 A EP04708585 A EP 04708585A EP 04708585 A EP04708585 A EP 04708585A EP 1595023 A2 EP1595023 A2 EP 1595023A2
Authority
EP
European Patent Office
Prior art keywords
fabric
curative
polymer
resin
compound
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04708585A
Other languages
English (en)
French (fr)
Other versions
EP1595023B1 (de
Inventor
Sharon A. Elsworth
Marvin I. Fredberg
William H. Fossey, Jr.
Stuart C. Press
Thad H. Fredrickson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raytheon Co
Original Assignee
Raytheon Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Raytheon Co filed Critical Raytheon Co
Publication of EP1595023A2 publication Critical patent/EP1595023A2/de
Application granted granted Critical
Publication of EP1595023B1 publication Critical patent/EP1595023B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/04—Layered products comprising a layer of synthetic resin as impregnant, bonding, or embedding substance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2915—Rod, strand, filament or fiber including textile, cloth or fabric
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2861—Coated or impregnated synthetic organic fiber fabric
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3472—Woven fabric including an additional woven fabric layer
    • Y10T442/3602—Three or more distinct layers
    • Y10T442/365—At least one layer is a preformed synthetic polymeric film or sheet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3854—Woven fabric with a preformed polymeric film or sheet

Definitions

  • the present invention relates generally to treated woven, knitted or unidirectional fabric, and more particularly to a treated woven, knitted or unidirectional fabric which is used to provide structures that can withstand high level working loads and extreme environmental conditions.
  • a resin such as Poly- Vinyl Chloride (PVC), polytetrafluorethylene (PTFE), urethane or other suitable resin
  • PVC Poly- Vinyl Chloride
  • PTFE polytetrafluorethylene
  • urethane urethane
  • the fibers or fiber bundles of the woven fabric are coated with a resin, thereby forming a matrix surrounding the fibers.
  • the matrix material is typically the medium, by which seams in the construction, can transfer load across the joints in the fabric.
  • a radome which is a dome shaped protective housing used to cover a radar antenna.
  • a radome may be subject to a severe set of conditions such as supporting heavy loads for extended periods of time at extreme temperatures and humidity.
  • the fiber/resin product (also referred to as the fabric product) is foil of voids or air pockets within the fiber bundles.
  • the fiber/resin product also referred to as the fabric product
  • the fiber/resin product is foil of voids or air pockets within the fiber bundles.
  • a drawback associated with these coated woven fabrics and seams is that when they are utilized to provide a structure such as a radome, they typically do not withstand the long duration, high level working loads and extreme environmental conditions.
  • a high strength, high modulus structural fabric product and the method of manufacturing the product are presented.
  • the incorporation of a fiber/fabric treatment coupled with a resin impregnation and coating process produces a composite material.
  • This composite material comprises high strength and modulus fibers embedded in and coupled to a matrix such that the resin matrix material penetrates to the filament level of the fiber bundle.
  • the resulting fabric product is useable in the formation of structures, which carry and distribute high-level loads across seams under extreme environmental conditions.
  • Figure 1 is a diagram of the fabric product
  • Figure 2 is a flow chart of the process utilized to produce the fabric product.
  • the present invention comprises a high strength, high modulus structural fabric product and the method of manufacturing the product.
  • a fabric product useable in air-supported structures, which is able to carry and distribute high level loads across seams under extreme environmental conditions and with high levels of survivability, is provided.
  • the incorporation of a fiber/fabric treatment coupled with a resin impregnation and coating process produces a composite material.
  • This composite material comprises high strength and modulus fibers embedded in and coupled to a matrix such that the resin matrix material penetrates to the filament level of the fiber bundle.
  • both the fibers and the matrix retain their physical and chemical identities, and forther produce a combination of properties that are not achieved with either constituent acting alone.
  • the fibers of the fabric are the principal load carrying members.
  • the fabric is combined with a surrounding resin matrix which keeps the fibers in a desired location and orientation.
  • the surrounding matrix forther acts as a load transfer medium between the fibers, provides a shear load transfer medium across seams and protects the fibers from damage due to environmental conditions such as temperature, humidity, and sunlight.
  • the present invention utilizes a resin application technology that effectively 'impregnates' a fabric substrate such that the resin surrounds fibers and fiber bundles and infiltrates the fiber bundles to the filament level.
  • the result is a fabric structure that has the combined properties of the resin for load transfer capabilities and the fiber/fabric system to carry loads.
  • the fabric product 1 includes resin impregnated fabric layer 60.
  • the resin impregnated fabric layer includes a fabric made of fibers such as Vectran®, Kevlar® or other high performance fiber which has been impregnated with the resin. As discussed above, the resin surrounds and infiltrates the fiber bundles of the fabric to the filament level.
  • the resin impregnated layer 60 has a resin coating layer 50 disposed across a top surface and a resin coating layer 52 disposed across the bottom surface. The resin coating layers thus cover the top and bottom surfaces of the resin impregnated fabric layer. Also shown is a second resin impregnated layer 62, which also has a resin coating layer 54 disposed across a top surface and a resin coating layer 56 disposed across the bottom surface of the resin impregnated fabric layer 62. While fabric product 1 comprising two- layers of the resin layer-resin impregnated fabric layer-resin layer groups is shown it should be appreciated that a fabric product could be comprises of any number of resin impregnated fabric layers and resin layers.
  • the resulting fabric product 1 may contain one or more resin impregnated fabric layers, 60 and 62 which are formed using a two-part castable urethane or other suitable resin system capable of providing resin penetration to individual filaments of the fabric.
  • a resin to curative stoichiometry range 85 to 110% theory.
  • the curative stoichiometry refers to the ratio of chemical components and the ratio of reaction to each of the components. Typical stoichiometry are in the 95% range.
  • a fabric product produced using a resin system 85 - 110% stoichiometry range did not achieve the desired performance.
  • the impregnation compound includes three components: a urethane pre-polymer, a co-reactant curative, and a diluent, such as toluene.
  • the impregnation compound in this embodiment is formulated as follows:
  • the mixture is then diluted to 75% total solids with toluene.
  • the ratio of curative to pre- polymer is derived from the formula:
  • FIG. 2 A flow chart of the presently disclosed method for applying the impregnating compound into the fabric is depicted in Figure 2.
  • the rectangular elements are herein denoted “processing blocks” and represent instructions or groups of instructions.
  • the method of producing the fabric product is described in conjunction with the flow chart of Figure 2.
  • the method 100 begins at processing block 110 wherein the base fabric is scoured to remove any lubricants applied by the yarn manufacturer, or those lubricants applied by the weaver. These lubricants could interfere with the development of high integrity resin to the base fabric interface. After scouring, processing proceeds with processing block 120.
  • Processing block 120 recites treating the fabric with a polymeric isocyanate to enhance adhesion of the impregnation compound to the fabric.
  • Processing block 130 is performed next wherein the impregnation of the base fabric is performed.
  • the impregnation of the fabric involves the continuous submersion of the fabric in a tank containing the impregnation compound.
  • the fabric is squeezed by a set of nip rolls to forther drive the impregnation compound into the fabric fibers and to remove any excess impregnation compound.
  • the fabric is then fed into a drying oven, as shown in processing block 150.
  • the drying oven is set at a temperature as required to remove diluents from the fabric-resin composite.
  • Processing block 170 is executed next wherein the resulting impregnated fabric is post cured at a temperature as required to cure the resin system. Following processing block 170 the fabric is ready for subsequent processing.
  • the resulting impregnated fabric is incorporated into the fabric product and is used to produce fabric structures.
  • the radome fabric can withstand working loads as high as 880 pounds per inch width for 56 hours at a temperature of 35 degrees C in a humid environment.
  • This invention allows the use of thermally welded seams to meet these demanding requirements. Seams made from this material are able to withstand in excess of 56 hours at 880 pounds per inch load, with high humidity, at 35°C using an overlap seam construction. This seam performance has not been achieved in other flexible composite applications
  • a high strength, high modulus structural fabric product and the method of manufacturing the product have been described.
  • the incorporation of a specific fiber/fabric treatment coupled with resin impregnation and coating processes produces a composite material.
  • This composite material comprises high strength and modulus fibers embedded in and coupled to a matrix.
  • the resulting fabric product is useable in the formation of seamed structures which carry and distribute high-level loads under extreme environmental conditions.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Reinforced Plastic Materials (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
  • Laminated Bodies (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Vending Machines For Individual Products (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
EP20040708585 2003-02-07 2004-02-05 Hochfestes, langlebiges lasttragendes gewebe/nahtbindesystem Expired - Lifetime EP1595023B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US44594003P 2003-02-07 2003-02-07
US445940P 2003-02-07
PCT/US2004/003231 WO2004072359A2 (en) 2003-02-07 2004-02-05 High strength, long durability structural fabric/seam system

Publications (2)

Publication Number Publication Date
EP1595023A2 true EP1595023A2 (de) 2005-11-16
EP1595023B1 EP1595023B1 (de) 2010-04-07

Family

ID=32869440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040708585 Expired - Lifetime EP1595023B1 (de) 2003-02-07 2004-02-05 Hochfestes, langlebiges lasttragendes gewebe/nahtbindesystem

Country Status (8)

Country Link
US (2) US7419719B2 (de)
EP (1) EP1595023B1 (de)
JP (1) JP4533373B2 (de)
AT (1) ATE463613T1 (de)
CA (1) CA2513865C (de)
DE (1) DE602004026411D1 (de)
IL (1) IL169448A (de)
WO (1) WO2004072359A2 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1645010A4 (de) * 2003-07-16 2008-08-20 Raytheon Co Starre radarkuppel mit polyester-polyarylatfasern und herstellungsverfahren dafür

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US7419719B2 (en) 2008-09-02
ATE463613T1 (de) 2010-04-15
CA2513865C (en) 2012-03-27
US20050130523A1 (en) 2005-06-16
WO2004072359A3 (en) 2005-03-10
US7767296B2 (en) 2010-08-03
EP1595023B1 (de) 2010-04-07
DE602004026411D1 (de) 2010-05-20
CA2513865A1 (en) 2004-08-26
IL169448A (en) 2010-12-30
JP4533373B2 (ja) 2010-09-01
JP2006518414A (ja) 2006-08-10
US20090130935A1 (en) 2009-05-21
WO2004072359A2 (en) 2004-08-26

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